Alyvia Alyn Lind was 4 in Dark Skies when she played the character 'Young Daughter'.
That was over 10 years ago in 2013.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 15, and has starred in 14 movies in total, 13 of those since Dark Skies was released.
In Dark Skies, I think Alyvia Alyn Lind looks: